Derives an enum of same-variant pairs of another enum.

Installation

sh cargo add samevariant

Use

Define an enum and use this derive macro:

```

[samevariant(pub ABCSameVariant)]

pub enum ABC { A, B, C(i32), } ```

It generates a new enum that looks like: ``` enum ABCSameVariant<'l> { Nonmatching(&'l ABC, &'l ABC), A, B, C(&'l i32, &'l i32), }

impl ABCSameVariant { fn pairs<'l>(a: &'l ABC, b: &'l ABC) -> ABCSameVariant<'l> { ... } } ```

If the base enum has a variant Nonmatching it will be prefixed by the original enum name (like ABCNonmatching).

Only simple and tuple variants are supported, struct-like variants will result in an error.